Apparatus for making brushes



Feb. 8, 1955 w. F. ENCHELMAJER APPARATUS FOR MAKING BRUSHES 4 Sheets-Sheet l Filed April 18 INVENTOR WILL/4M F EA/(HELMA/ER WWW/ ATTORNEY Feb. 8, 1955 w. F- ENCHELMAIER APPARATUS FOR MAKING BRUSHES Filed April 18. 1950 4 Sheets-Sheet 2 INV-ENTOR WILL/HM Ff/vommfl/ae BY 4 WWW ATTORNEY Feb. 8, 1955 W. F. ENCHELMAIER APPARATUS FOR MAKING BRUSHES 4 Sheets-Sheet Filed April 18. 1950 huh Hllllllllllllll "Ill 4 I-HII Ill" 5 V INVENTOR WILL/AM FE/vma/m/ER WM Mu ATTORNEY W. F. ENCHELMAIER APPARATUS FOR MAKING BRUSHES Feb. 8, 1955 4 Sheets-Sheet 4 Filed April 18, 1950 HNVENTOR FEA/c/s ELMH/ER WM. Alla ATTORNEY United States Patent APPARATUS FOR MAKING BRUSHES William F. Enchelmaier, Cedar Grove, N. J.

Application April 18, 1950, Serial No. 156,697

20 Claims. (Cl. 300-2) This invention relates to an improved, simplified, apparatus for making cylindrical brushes of the type wherein the bristles are held between the turns or convolutions of one or more bristle holding strands, cords, or the like helically wound on the brush core.

Apparatus, of which the present invention is an improvement, in which cylindrical brushes are made in a manner above indicated is shown in each of the patents to Angell, Nos. 1,721,062; 1,824,649; 1,950,379; and 2,061,129. Such Angell patents show typical prior art structures of apparatus for making cylindrical brushes with which the present invention is concerned. In such structures, particularly those which feed the bristles continuously, in untufted relationship,- the feeding mechanism for the bristles is complicated, unwieldy, and slow in operation. Furthermore, such bristle feeding mechanism, because of its intricacy, is expensive to maintain.

Accordingly, it is among the objects of the present invention to provide a simple, economical, apparatus, capable of speedy operation, for producing cylindrical brushes of the type wherein the bristles are held between the convolutions of one or more bristle holding strands of cord or the like helically wound on the brush core.

More specifically, in a preferred embodiment of the apparatus of the invention, the invention has as an object the provision of apparatus for producing the brush, in the manner indicated, in which a wheel, positioned with its axis generally normal to the axis of the brush core, is stationed so that the rim of one part of the wheel is generally tangential to the cord being wound on the brush core in the portion thereof first entering upon or engaging the brush core, another portion of the wheel feeding bristles continuously between portion and the last laid complete convolution of cord on the core.

Yet another object of the invention lies in the provision, in apparatus of the type above indicated, of a means for driving such cord and bristle feeding wheel and preferably also the means for feeding bristles to said wheel, the wheel and the bristle feeding means being driven by the winding up of the bristle retaining cord or cords on the brush core.

Yet another object of the invention lies in the provision of a simplified means for impregnating the bristle retaining cord or cords and the butt ends of the bristles with curable bristle and cord retaining adhesive.

These and further objects of the invention will be more readily apparent upon consideration of the drawings accompanying the present specification and forming a part thereof in which:

Fig. 1 is a fragmentary view in front perspective of apparatus made in accordance with the invention;

Fig. 2 is a view in plan of the brush making apparatus shown in Fig. 1;

Fig. 3 is a view in vertical cross-section through a portion of the apparatus shown in Figs. 1 and 2 the section being taken in the vicinity of the means for applying the bristle retaining strands or cords and the bristles to the core, the section being taken along the line 33, in Fig. 2;

Fig. 4 is a view in bottom plan of the cord and bristle applying wheel, the view being taken from a point of view along line 4-4 in Fig. 3;

Fig. 5 is a view in horizontal section through the apparatus above the cord and bristle applying wheel, the

section through the supporting and driving shaft for such entering cord such wheel being taken along the line 5-5 in Fig. 3; and

Fig. 6 is a view in axial vertical section through the brush core in the vicinity of the zone in which bnstles are applied thereto, the section being taken along the line 6-6 in big. 5.

As shown in Figs. 1 and 2, the basic structure of the brush forming apparatus or the invention may conveniently take the term of a lathe, generally designated by the rererence character 2. Such lathe includes the parallel ways 4 on its bed, and a head stock 6 carrying a chuck 8, the head stock being rotatably driven by the belt 10 extending to a prime mover, not shown. Slidable longitudinally of the ways 4 is a carriage, generally designated 12, such carriage being constantly urged to the left, as the apparatus is snown in Figs. 1 and 2, by means such as the weight 14 which is connected to the carriage through the medium of the cable 16. Such cable extends over the guide sheave 15, arh'xed to the bed of the lathe, and is connected to the carriage at 20, as shown in big. 1.

The core 22 of the brush, which in this instance is in the form of a metal tube, is secured at one end by the chuck 8, the core being rotatably carried by the bushing 24 afll'xed to the left-hand edge or carriage 12, as shown in rigs. 5 and 6, such bushing serving as a slidable outboard bearing for the brush core. For ease of further description of the apparatus the operator for the machine will be considered hereinafter as standing at a position to the left of carriage 12 as the device is shown in Fig. 2. Portions of the apparatus at the operators left, as he stands facing the brush being wound will be described as left and those at his right will be described as right. Portions of the apparatus generally beyond the brush will be described as being to the rear, whereas those generally on the side of the brush ad acent the operator will be described as being located at the front of the apparatus.

As shown in Figs. 1 and 2, the carriage 12 is made of two main supporting plate portions, the rear plate portion 26 and the front plate portion 28. The upper surfaces of such plates, which, as shown, are disposed horizontally, lie substantialy flush with the upper surface of the brush core 22. Plates 26 and 28 are joined by bridge members spanning the brush core so as not to interr'ere with such core, one such bridge member being shown at 30 in Figs. 1 and 2, where it is depicted as being joined to the plates by studs. Plate portions 26 and 28 are further connected at the left by means of the bridge member 32 which includes a brush core engaging bore therethrough as a continuation of that through bushing member 24. Bridge member 32 is secured to the plates 26 and 28 by studs, of which one is shown at 34 in Fig. 6. The carriage structure 12 is supported upon ways 4 by means of the guiding support members 36 affixed to the bottom of plate 28. The bushing 24, previously described, is secured to the bridge member 32 by being positioned in the seat 38 in the left-hand edge of the latter, as shown in Fig. 6. Bushing 24 is terminated at its top in a plane flush with the top of core 22, as indicated at 130, to accommodate wheel 72, to be described.

The apparatus of the illustrated preferred embodiment of the present invention includes a dual-diameter bristle and bristle-securing cord feeding wheel which is positioned on the carriage in such position as to feed the cord entering upon the core in a direction generally tangential to the helix which such cord assumes when it is wrapped upon the core. The axis of such cord and bristle feeding wheel accordingly lies generally normal to the axis of the core, the axis of such wheel preferably substantially intercepting the axis of the core as shown, the wheel being positioned closely adjacent one side of the core.

The cord and bristle feeding wheel and its manner of support are more clearly shown in Figs. 3 to 6, inclusive.

,As there shown, there is provided a top horizontal memis screwed in to the lower 'wheel's'upp'o'rtin'g' member 50 which, as shown, is horizontal and likewise parallel to table-member 28. Member 50 is further supported from thet'able'by means 'of the interposed supporting spacer member 51, shown in Fig. 3. Members 40 and 50 carry journaledftherebetweenthe right=hand vertical shaft 52, which carries on "th'etop thereof-"the sheave-54 keyed thereto; 'To'the left of sheave 54thei-e ispositioned the idler sheave 56 which is supported from member' 40by i'ri'eans' ofthe stub axle 58; The lefthandv'ertical shaft 60 is likewise journaled by means of supporting members 40 "and 50'. Shaft 60 carries on the top "thereof the sheave 62keyedithere'to. Bothshaft's 52 and 60 are supported at the bottom thereof by ball bearings, suchbearing for shaft '52'bein'g""desigi1atied 6'4"and that for shaft 60 being denoted 66. Shafts'52' and 60 are drivingly connected by means" of the 'V belt ,68whi'ch-is entrained around'sheaves 54' and "62, the belt being tensioned by means ofthe idler sheave'56.

Q? Shaft 52 carries'ori the bottom end thereof, below memberso; the sprocket 70 and thefV-groovedsheave i150, subsequently 'to'b'e'more particularly described as to fdridtionf Shaft 60 carries on the bottom thereof, below member 50, the composite cord and bristle feeding'applicator wheelfgenerally designated 72. 'Int'egralwith the hub 74 bf such wheel'isthe upper, larger diameter wheel portion 76 wh'i'ch, as 'm'oreclea'rly shown in Fig.4, is shallowly serrated on its periphery,"to give it a more effective b' ristl'e feeding action. The t'e'th'78 o'n'isuch periphery'are'a's shown, of square configuration,- such teeth being separated by the notches'or valleys 80 therebetween. The 'serrationsfoii'wheel portion 76 are not pronounced enough to cause the bristles as fed on'to'ftli'e brush core to lie inbther'than substantially continuous helices of substantially constant width. t The lower portion 82 of the composite wheel 72 'is ,ofja smallendiarneterthan portion 76, wheel portion 82 having 'a 'radius','as more clearly shown in Fig.4, which is generally equal to'th'at of wheel portion 76 measured to the bottom of'a' notch 80,'minus the diameter of the bristle retaining cord. Wheel portion 82 is securedt'o'the main portion"'of the wheel by means of the angularly spacedfstuds 84, as shown in'Fi .4. "The periphery 'of the lowerisrnaller wheel portion 82' is" srra'ted'to provide the, shallow, generally. saw tooth shaped, "sefrations '86 thereon; the straight, radially disposed, walls of serrations 8 facing toward thedirection from "which they cord is fed tosuch wheelportion. Setrations 86 cause the cord .unslippingly, to grip the wheel portion 82. i

Informing a cylindrical wound brush by the apparatus of the invention, thereis provided on thebrush co're 22, at a position near the left-h andend thereof, the starting collar 8 8; Such collar is retained on the brush core as by means of a setscrew shown at 90. Co1lar88- is pro- ;vi dedin one zone thereof with a'helical cut 92 which receivesythe starting ends of the bristleretaining cord or cords employed. At the deepest portion-of such helical cut there are provided. bores 94 therethrough, one for feach'gcord. the cord being passed through suchboresand each provided with a knot at a position outside the collar, onesuch knotbeingshown-at96; f

";;Ir r the embodiment .of-theapparatus shown, there are employed two bristle retaining cords, one woun tQ l top of the other. The bottom cord, which may be-made of hemp orsisaL-is designated 98. The upper cord, which is preferred to-make of stronger more chemically re- .sistant; material-such as twisted nylon, is designated 100.

The bristles, designated 102, have their butt,"- inner ends 104-adiacent the core held bet-ween adjacent convolutions .of such cords 98- and 100. The finished-brush portion, that is, that with thecordswoundthereon and the bristles ,heldbetween adiacent'helices of the cords, but with the .ther-mosetting resin with-which: the cords and bristle ends 104 are impregnated not yet-cured, is designated generally "106. 'It willbeunderstood that after the brushhas-been :fully wound,- the ends of. the strands at the ri ht are'se- Lcured, as by a further collar similar to collar 88, applied toi tli'ef core. The brush is then placed in an oven tocure the resin. impregnating the strands and the butt ends of the bristles.l p r a l As shown in Fig. 1,'.the cords 98 and 100 proceed from soureesf '(not shown). over the respective guidesheaves 108,108 fdow'nwardl'y throu h [cord. tensinni ng zv means. 'The'cord"tension'ing"means forco'rd 100 has' its parts designated by the same reference characters as those em- 4 pl'oyed in" describing'that forcord 98," but with an added prime. The tensioning means" shown at the right in Fig. 1 consists of a fixed tensioning plate affixed to the rear edge of plate 26and the spring pressed movable plate 112, the cord 98 being compressed between such two plates. Plate 112 is thrust toward plate 110 by means of the compression springs *1 14--Which surround headed studs which extend through plates 112 and 110 and are threaded intocarriageplate p'ortion'26. After leaving such cord-tensioning means, each cord is-then fed downwardly into a container containing a cord impregnating therrnosetting resin which maybe, for example agphenolformaldehyde or a urea-formaldehyde resin. Such container for cord-98 is-designated -116, there being positioned at the bottom of the container a guide sheave 118 around which the cord runs, such sheave being journalled in fixed supporting structure not shown. .The cord then rises from the container 116, passes around theguide sheave 120 above thecontainer," and progresses to the cord applying portion 82 0f the composite wheel 72. The similar partsacting upon cord 100, that is, the-impregnating resin container; the guide sheave. within the container; and the 'top' co'rd' guidingsheave; are designated by the-same-referen'ce charactersas those" previously employed in designating the apparatus described for treating the cord98, but with an added prime. Cord'100occupies the upper position on wheel portion 82and'thus the outer position on the brush core whereas'cord 98 oc'cupies the lower position on the wheel portion 82 and the inner position on the brush core, as more clearly shown in Figsr3and'6." a

Thelast'complete helix of the cords wound'upon the brush core is designated" 122, as shown in'Figs. 5 and 6. The left-handface of bushing' 24 is of such configuration -that it contacts the last helix of the cord or cords including the portion thereof just entered upon the brush core, substantially over'their entire extent. Suchleft-hand edge of bushing 24 is thusin the form of a helix, the portion thereof which contacts the last laid complete convolution. of the cordsbeing designated 124. "At' thetop, the bushing 24is flatted off flush with the upper surface of core 22 of thebrushto allow the lower portion 82of the composite wheel to rotate close to such upperrsurface of the brush core. At a position beyond the composite. applicat'onwhee'l, that is, above it as it is shown in Fig; 5, thehelical face portion 128 of the bushing 24 is spacedto the right-of the end of portion 1-24 of its face a distance generally equal to the diameter of the cord or cords, employed, plus the width of the bristle row caught between the convolutions of the cords. Theentering helix of the cord. that is,'that leaving portion 82 of the composite applicator wheel and first entering into engagement with the brush core, is designated 126, 2 1 .,i Besides, laying the cord acc urately.;upon the brush core. in the manner. indicated,,the composite wheel .-72 also'feeds between such entering, portion 126 of the cord and the-last'previously completely'laid helixof cord a substantially continuous row tof' bristles 'of'nredetermined width. The'apparatusaccomplishes'such feeding ofthe row of bristles in the followingqna'nner. Portion 28 of carriage 12 "is' provided with a right-hand fixed bristle guide 132 which is elevatedfiabove the surface "ofipart 28 on "spacer sleeves of which" one isshown at 133 in 'Fig. .1, being retained, in such" elevated position parallel to -the upper-surface of part 28 by studs "135 extending through the spacer sleeves into part28. Therear. lefthand'co'rn'er guide-132 extends almost into contact with the peripheryof portion 76 0f wheels 72. ='Gt1ide 132 'is of the same thickness as wheel portion 76 and lies on the same level as such wheel portion 5- Also:'affixed to plate 28 isthe left-hand fixed bristle guide member. 134 which iswpositionedparallel-to member 1132 but spaced therefrom so as. to form a bristle feeding'channelv thsrebetweena Member 134: is of :the same-thickness as and is. retained at the-same horizontal level above part 28 as, guide 132, by means of theZ- shaped bracket ;137, at--:the;;;fr,ont end, of memberiglli i The 'spa cing b'etween bristle gatin riiiiib'ers 1:32am! 134 and plate 28 is such as to provide space between such bristle guiding members and he upper surface of plate 28 sutficient for the reception of two bristle feeding chains and for a portion of the supporting and driving mechanism therefor. The right-hand bristle feeding chain is designated 136. Such chain is entrained about the previously described sprocket 70 on shaft 52, the rear left sprocket 138, and the front sprocket 140, such sprockets being positioned above part 28 and carried on stub shafts journaled in such part. Sprockets 138 and 140 are positioned so as to provide a run of the chain parallel with, and projecting slightly outwardly from beneath, the left-hand edge of the bristle feeding guide 132. The left-hand bristle feeding chain, associated with fixed bristle guide member 134, is designated 142. Chain 142 is entrained over the rear sprocket 144, the front central sprocket 148, and the front left sprocket 146, sprockets 144 and 148 being so positioned as to provide a straight run of the chain parallel with and projecting slightly outwardly from beneath the righthand edge of bristle guiding member 134. Sprockets 144, 146, and 148 are positioned with respect to, and supported in the same manner on carriage part 28 as, sprockets 138 and 140.

Chains 136 and 142 are driven in the direction shown by the arrows in Fig. 2, so as to impel stacks of bristles positioned between members 132 and 134 toward the feeding wheel 72. Such drive is effected by means of the crossed V belt which is entrained about the previously described sheave 150 on shaft 52, a sheave 154 connected to sprocket 140, and a sheave 156 connected to sprocket 146, the V belt being crossed as it passes around sheave 156. All such sheaves are located on the same horizontal level, the sheaves 154 and 156 lying above carriage part 28 and beneath their respective sprockets. Such V belt is designated 152.

To assist the chains 136 and 142 in their feeding 'of bristles toward the applicator wheel, there are also provided the following reciprocating bristle feeding mechanisms. As shown in Fig. 2, there is positioned on top of the front right portion of table member 28 the freely swinging block member 160 which is connected to member 28 by means of the rod 162, such rod being pivoted to the table at a position forwardly of the apparatus beyond the confines of Fig. 2. Block member 160 guides the reciprocable bristle feeding member 164 through the medium of the longitudinal guide means 166 between such members. Member 164 has projecting from the left-hand edge thereof the bristle feeding finger 168 which overlies the right-hand edge of bristle guiding member 134.

Elements 160 to 168, inclusive, are employed as follows: a bundle of bristles of the proper length, temporarily held together as by a rubber band positioned about the top of the bundle, is placed against the righthand edge of member 134, the member 160 being at that time in retracted position to the right. member 160 is swung to the left, by means of the upstanding handle provided thereon, to grip such bundle of bristles between members 134 and 164, whereupon the rubber band may be removed. The block 164 may then be thrust to the rear to cause the bristles to travel between members 132 and 134 and into gripping relationship with the bristle conveying chains 136 and 142.

To assist such chains in their feeding action and to provide a positive feeding action upon the bristles, there is provided a further reciprocating bristle feeding mechanism. Such mechanism takes the form of the reciprocable feeder member 170 which, as shown, has on its left-hand edge the depending flange 172. Flange 172 engages the left-hand edge of the guiding member 134.

Thereupon A push rod 176 is connected, as shown, to the left-hand 1 forward corner of member 170, such push rod extending through a bore in the freely rotatable vertically disposed guiding post 178 mounted on carriage part 28. Connected to the front end of push rod 176 is the cross arm 180, to the left-hand end of which is secured the cord 182 which runs over the guide sheave 184 afiixed to the bottom part of carriage plate 28. A Weight (not shown) is secured to such vertical cord portion, thereby constantly urging feeder member 170 rearwardly.

It will be apparent that such supporting and guiding structure for reciprocating feeder 170 allows it intermittently freely to be retracted to the left, after it has substantially reached wheel 82, pulled forwardly, and then placed into engagement with the forward end of a fresh group of bristles fed into the guide channel. It may, however, be placed in the position shown and is then stably held by reason of the angular disposition of the push rod 176 with respect thereto. When in such position, block exerts a constant rearward feeding action upon the bristles in the rear portion of the guide channel between members 132 and 134 by reason of the engagement of such bristles by the laterally projecting finger 186 on block 170, such finger overlying the lefthand edge of guide member 132.

The bristles 102, fed toward the applicator wheel between the left-hand edge 186 of member 132 and the righthand edge 158 of member 134, are engaged by the teeth 78 on the bristle feeding portion 76 of such wheel, and are impelled to the left in a curved path by such Wheel to assume a position between the last completely wound convolution of cord or cords on the brush core and the entering portion 126 of the cord just being fed on to the core. The rear portion of guide member 134 is formed with a curved edge 188 concentric with the periphery of the wheel 76 and spaced therefrom the desired distance to give the predetermined width to the substantially continuous row of bristles to be secured between convolutions of the cord. As previously explained, the bristle guiding members 132 and 134 are positioned at the same level as the upper, bristle feeding, portion 76 of the composite feeding wheel. Such rear curved edge 188 of member 134 is terminated at a point 190, shown more clearly in Fig. 5, where there is sufficient engagement between the bristles being fed and the two convolutions 122 and 126 of the cord to insure their subsequent stable positioning on the brush core.

In order to insure the removal of stray bristles from the feeding wheel, which bristles may not have been sufiiciently engaged between the cords on the brush core to remove them from the wheel portions 76, there is provided the stripper finger 192 supported, as shown in Fig. 2, from the vertical post 194 mounted on carriage part 26. Such stripper finger lies beneath the wheel portion 76 and substantially in contact with the periphery of the lower wheel portion 82, whereby it cams away from the wheel any of the described stray bristles which have not been applied to the brush.

It will be seen from the above description that the apparatus of the present invention is characterized by its simplicity when compared to previously known devices for making cylindrical wound brushes. The action of the device is smooth and fast, since no rapidly reciprocating members for feeding the bristles are employed, such feeding being done by a smoothly and steadily rotating wheel. In the described preferred embodiment of the apparatus, the drive for the composite cord and bristle applying wheel, as well as for the bristle feeding chains in the channel leading to such wheel, is derived solely from the winding of the cord or cords upon the brush core, such cord or cords, by reason of their frictional engagement with the serrated periphery of the wheel 82, driving such wheel, and, through the medium of the described sheaves and V belt, the bristle feeding chains in the channel leading to the applicator wheel. As a result, perfect synchronism of the parts is constantly maintained, it being impossible for the apparatus to deliver the bristles to the brush core at any but the predetermined rate.

Whereas for purposes of illustration I have shown and described a preferred embodiment of the apparatus for making brushes of my invention, it will be understood that such embodiment is illustrative only, and that the apparatus is capable of considerable variation as to details. The invention is, therefore, to be defined by the scope of the claims appended hereto.

I claim as new the following:

1. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in said last named means which comprises a carriage mounted for movement along the brush core parallel with the axis thereof, a strand applying means mounted on the carriage, a wheel mounted on the carriage adjacent said last named means, said wheel having a bristle feeding periphery, means for supplying bristles to the bristle feeding periphery of the wheel, means forming with the bristle feeding periphery of the wheel a bristle conducting passage extending from the bristle supplying means sub ,ij 1': 1 Risen-15:: imiig om flex-At. .wm. stantially. directly to the brush core-bet .een the last bornplete. turnofthe coil.,:o .the strand and the portion of.the strand at .its.first engagement withthe core, and-means to turn; the. wheel at a speed synchronized with that of thebrushcorew i m2. ;In.-a1.mach ine.-for.making brushes, .said machine havingoin combination a brush icoreflrotating,elernent, means for; supplying a strand. for theformation of a coil on the brush core and for feeding bristlesbetween the turns-of .the, coils-during. therotation of.the. core, .the improvementtintsaidjtlasnnamedmeans. which comprises a carriage .mounted for movement along, the brush coreuparalleL-with the. axisuthereof, ;a; .strand.applying. means mountedongthe carriage, .a ,wheelmountedon ,the carriage adjacent. said .last .named means, said-,wheel having a-brist1e feeding periphery lying at least generally. .tangentialto. the row-f bristles last laid on the brush core, a. bristle. guidingnmeans. on. the: means for supplying bristles .toi-the'zbristleieeding periphery of.the wheel, 5

means. forming with. thebristle feeding, periphery ;of the wheelza. curved bristle conductingpassagefrom the bristle supplying means to the brush core betweenthe last completeuturn. ofxthe-coilvof the strand andthe .portion of the strandat itsfirst engagement with the'core, and means to drive the-wheel..in.the. same'.relative dir ection asthe brush core andat ;such speed. that the peripheral speed thereof. is substantially equal to the peripheral speed of the brush core. 4 I ,.3.-In= a. machine. having inncombination .a.brush coremrotating element, means for supplying a strand forthe ,formation of a coil on the brush core and ,for .feeding bristles between the turns ofthe coil'during the rotation of the core, the improvement .in said .last named. means which comprises. a carriage mounted for movement along the ,brush .core par- .allel .With theaxisuthereof, .a strandv applying means mounted .onthecarriage and positioned adjacent one, side of theicore, a bristle applyingwheel mounted on the carfori making, brushes, said machine riage adjacentsaid lastnamed.means,,,the axis of the wheel lying generally normalato theaxis of the core, said. wheel having-a-bristle feeding periphery lying-at least generally tangential to theyrow, of bristleslast laid on the brush. core,-.a bristle guiding means on the carriage leading to :theabristleteeding.:periphery of the wheel,

meansforming: with the bristle feeding periphery, of; the .wheelza curvedzsbristle .conductingpassage .from the bristle guidingrrneans substantially directly to -,the brush core between theplast complete,.turn of the ;coil of;.the strand andthe, portion of. the strand atzits first engage- .ment with-the tcore, and-:means-todrive the wheel in the same relative direetion.-as, .the brush core andat such speed: that the: peripheralspeed.thereof is substantially equal to .the aperipheral speed .of the brush core.- 4; ln-a machine for making brushes, said .machinehaving.in..combination;.a brush core rotating element, means forsupplying astraudfor theformationof a coilon the -brush'.:coreand-fonfeeding bristlesbetween the turns of the.coil-.during; the rotation of.the core, theimprovement in.=said last named means which comprisesa carriage mounted for movementalong the brush coreiparallelwith the axisthereof, a strand .and bristle, applying wheel mounted .on the .carriage and positioned .adjacent one side 'of the; core, -the axisofthe wheel lying generally normal to the .axis-of'the core,.said wheel havinga first portion for engagement with the strand as it is led onto the brush ,COIC, the edge of-.such.first portion of the wheel nearest the strand in,;that portion thereof, first engaging the brush 360116. being. substantially tangential to the. enteringend of such first turn, said wheel having a second bristle feeding portion, a bristle;guiding,means 0n;the carriage -leading.-,to,.the periphery of the. second portion of the ,wheel, ,rneans forming with, theseeond portion of the wheel a-cnrved bristle conducting passage from. the bristle guiding meansto, ;the.brush corebetween the last complete turn of.the;coil of thestrand and the portion of the strand at :itsfirst engagementwith the core, the winding of the strand by. the; core and its engagement with theafirst portionof .thewheel. serving as the sole source of motive powerto turn such wheel... 1. ,...5, Infa machineror making .brushes, .said machine havin in combination a core :rotating .element, means -for-:si1pplying: a strand for the. formation ,of mu on the brush core and for-feeding bristles between the.- turns of= the coil during-the rotation'of-the core,--the improve.

ment in said last named means which comprises a carriage mounted for movement, along the brush core parallel with the axis .thereof, said carriagerhaying c0nnectedthereto a block, means constantly urgingtthecfarriagein such direction as tojmain'tain lateral compression by, the block on theturns of. the strand Ionthe.-Lc0r,e, ja strand and .bristle applying ,wheel mountedon the carriage and positioned. adjacentaone side. of the core, the axis. of.the wheel lying, generallynormal .to .theaxis of the core, saidwheel being positioned adjacent the surface ofithe brush .core, tlie wheel having .a first portion for engagement withthe strand as it is -ledon to. the brush core,.thefedge of such first portion of the wheel nearest the strand. first engaging the brush core 'being tangential to ,the..entering end of such first turn, the strandv engaging such first portion of thev Wheel overi a substantial. angular extent, meansv for imposing Ta substantial retarding tension on the strand in that'portion thereof. leading to the wheel, said wheel having "a 'second, larger diameter, portion lying outwardly of the first portion ofthe wheel with respect to the brush core, a bristle. guiding meanson the carriage leading to the periphery of the second portion of thewheelfr'neans forming with the second portion of the wheel a c'urved bristle conducting pass'ag'efrom the bristle guiding means 'to the brush 'core between the last complete turn of the coil of thestrand and the portion of the strand at its first engagement with the core, the winding of the strand by the core and its engagement with the first'portion of the wheel serving as the sole source of motive power to turn suchwheel. I g

6.- In a machine for making brushes, saidjr'nachine havingin combination a'brush core rotating element, means for supplying a strand for the formationof a coil on'the brushcore and for feeding bristles between {the turns of the coil during the rotation of the core, the improvementin said last named means. which" comprises a carriage mounted for movement along ,the'brush core parallel with the axis thereof, said carriage having connected thereto a block, means constantly urging the carriagem such direction as .to maintain lateral compression bythe block on'the turns'of'the strand: on the core, a strand and bristle"applying wheelmounted on the carriageand positioned adjacent one side of the core, "the axis of the wheel lying generally normal to the axis of the core, said wheel havinga first portion adjacent, the surface; o f the brush core for engagement with the strand ash is led on 'tothe brush core, the edge of such first portion of the wheel nearest the strand in thatfp ort'ion thereof first engaging the brush core being generally tangentlalto the entering ,end of such first turn of the coil,

,the strand engaging such first portion of the wheel over the lfa'st complete turn of .the coil of .the strand and 'the portion of .the strand at substantially its first engagement with the core, the Winding of the strand by the core and its engagementwith the first portion ofthe wheel serving as the sole sonrce of motive power to turn such wheel.

7., Ina machine formakmg brushes, said machine havmg .lncombination a brush core rotating element, means .for-supplyirtga strand for the formation of a coil on the brush core and for feeding bristles between the turns of the 0011 during the rotation of the core, the. improve- .ment in said last named means which comprises a car- .rage mountedfor movement along the brush core, par- .allel wlth the axis thereof, said carriage having connected thereto a block, means constantly urging the car- ,riage in suchjdirection as to maintain'lateral compression by the block on the turns of the strand on the core, a

.strand and bristle applying wheel mounted on the carriage and positioned adjacent one side of the'core, the axis of the wheel lying substantially normal to the axis of .the core, saidwheel having a first, smaller diameter, portion'adjacent the surface of the brush core for'engagement withthe strand as it is led on to the brush core, .the edge of such'first portion of the wheel nearest .the strandin .thatportionthereof first engaging the brush score being generally tangential to .the venteringend (tithe first turn of the coil, the strand engaging such first portion of the wheel over a substantial angular extent, said wheel having a second, larger diameter, portion lying outwardly of the first portion of the wheel with respect to the brush core, a bristle guiding means on the carriage leading to the periphery of the second portion of the wheel, means forming with the second portion of the wheel a curved bristle conducting passage from the bristle guiding means to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, the winding of the strand by the core and its engagement with the first portion of the wheel serving as the sole source of motive power to turn such wheel.

8. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in saidlast named means which comprises a carriage mounted for movement along the brush core parallel with the axis thereof, said carriage having connected thereto a block, means constantly urging the carriage in such direction as to maintain lateral compression by the block on the turns of the strand on the core, a strand and bristle applying wheel mounted on the carriage and positioned adjacent one side of the core, the axis of the wheel lying generally normal to the axis of the core, said wheel having a first, smaller diameter, portion adjacent the surface of the brush core, for engagement with the strand as it is led on to the brush core, the edge of such first portion of the wheel nearest the strand in that portion thereof first engaging the brush core being generally tangential to the entering end of such first turn of the coil, the strand engaging such first portion of the Wheel over a substantial angular extent, means for imposing a substantial retarding tension on the strand in that portion thereof leading to the wheel, said wheel having a second, larger diameter, portion lying outwardly of the first portion of the wheel with respect to the brush core, a bristle guiding means on the carriage leading to the periphery of the second portion of the wheel, means forming with the second portion of the wheel a curved bristle conducting passage from the bristle guiding means to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, the winding of the strand by the core and its engagement with the first portion of the wheel serving as the sole source of motive power to turn such wheel.

9. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the brush core, the improvement in said last named means which comprises a carriage mounted for movement along the brush core parallel with the axis thereof, said carriage having connected thereto a bushing surrounding the as yet unwrapped brush core, means constantly urging the carriage in such direction as to maintain lateral compression by the bushing on the turns of the strands on the core, a strand and bristle applying Wheel rotatably mounted on the carriage and positioned adjacent one side'of the core with the strand and bristle applying portions of the wheel lying adjacent the strand contacting side of the bushing, the axis of the wheel lying substantially normal to the axis of the brush core, said wheel having a first, smaller diameter, portion adjacent the surface of the brush core for engagement with the strand as it is led onto the brush core, the edge of such first portion of the wheel nearest the strand in that portion thereof first engaging the brush core being tangential to the entering end of such first turn of the coil, the strand engaging such first portion of the wheel over a substantial angular extent, means for imposing a substantial retarding tension on the strand in that portion thereof leading to the wheel, said wheel having a second, larger diameter, portion lying outwardly of the first portion of the wheel with respect to the brush core, a bristle guiding and feeding means on the carriage leading to the periphery of the second portion of the wheel, means forming with the second portion of the wheel a curved bristle conducting passage from the bristle guiding and feeding means to the brush core between the last complete turn of the coil of strand and the portion of the strand at its'first engagement with the brush core, means driving the bristle guiding and feeding means from and in synchronism with the strand and bristle feeding wheel, the winding of the strand by the brush core and the engagement of such strand with the first portion of the wheel serving as the sole source of motive power to turn the wheel and to drive such bristle guiding and feeding means.

10. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the brush core, the improvement in said last named means which comprises a carriage mounted for movement along the brush core parallel with the axis thereof, said carriage having connected thereto a bushing surrounding the as yet unwrapped brush core, means constantly urging the carriage in such direction as to maintain lateral compression by the bushing on the turns of the strands on the core, a strand and bristle applying wheel rotatably mounted on the carriage and positioned adjacent one side of the core with the strand and bristle applying portions of the wheel lying adjacent the strand contacting side of the bushing, the axis of the wheel substantially intersecting the axis of the core and lying substantially normal thereto, said wheel having a first, smaller diameter, portion adjacent the surface of the brush core, for engagement with the strand as it is led on to the brush core, the edge of such first portion of the wheel nearest the strand in that portion thereof first engaging the brush core being tangential to the entering end of such first turn of the coil, the strand engaging such first portion of the wheel over a substantial angular extent but for less than 360, means for imposing a substantial retarding tension on the strand in that portion thereof leading to the wheel, means between the tension imposing means for the strand and the strand and bristle applying Wheel for immersing such strand in, and thus impregnating it with, a heat curable adhesive material, said wheel having a second, larger diameter, portion lying outwardly of the first portion of the wheel with respect to the brush core, a bristle guiding means on the carriage leading to the periphery of the second portion of the wheel, said last named means comprising spaced parallel members having a bristle guiding channel between them, the channel being disposed substantially radially of the wheel, a bristle feeding means comprising two elongated flexible members, guide sheaves for each of such flexible members, each such flexible member having a straight portion disposed adjacent its respective edge of the channel so as to engage bristles in such channel, means on the end of one of the spaced parallel members forming with the second portion of the wheel a curved bristle conducting passage from the bristle conducting channel to the brush core between the last complete turn of the coil of strand and the portion of the strand at its first engagement with the brush core, means driving the flexible bristle feeding members from and in synchronism with the strand and bristle feeding wheel, the winding of the strand by the brush core and the engagement of such strand with the first portion of the wheel serving as the sole source of motive power to turn the wheel and to drive such elongated flexible bristle feeding members.

11. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a plurality of strands, one on top of the other, for the formation of a plurality of superimposed coils on the brush core and for feeding bristles between the superimposed turns of the coils during the rotation of the brush core, the improvement in said last named means which comprises a carriage mounted for movement along the brush core parallel with the axis thereof, said carriage having connected thereto a bushing surrounding the as yet unwrapped brush core, means constantly urging the carriage in such direction as to maintain lateral compression by the bushing on the turns of the strands on the core, a strand and bristle applying wheel rotatably mounted on the carriage and positioned adjacent one side of the core with the strand and bristle applying portions of the wheel lying adjacent the strand contacting side of the bushing, the axis of the wheel substantially intersecting the axis of the core and lying substantially normal thereto, said wheel having a first, smaller diameter, portion adjacent the surface of the brush core, for engagement with the strands as they are led on to the 11 Briish core, the edge 'of"su ch first portion fof thewheel nearest the 'strandsiin that portion thereof first engaging the brush core'beingjtangential to'the enteringe'ndsof stich'firs't superimposedfturns of the coils, the st'rands engaging; such firstfportion of'the wheel over 'a substantial angular extent but for less than 360,jrneans for imposing a substantial retarding tension on fe'ach of the strands in that portion of each leading to the wheel, and meansfbetwcenj'the tension imposing means forje'achof the strandsiand' the strand 'andb'r'istle applyingwheeltor immersingfs'uch strands in, and thus impregnating them with, a"heatcu rableadhesive material, said wheel havingfa second, largerjdiameter, portion lying outwardly of'thefirst-portionof the wheeljwithrespect to" the brush lco'regthe periphery'ofsuch second-portion ofthe wheel being" shallowly serrated, a bristle gu'idingmeans on the carriage'leading to 'theperiphery' 'of the second portion of the 'wheel, said lastfna'rned ,means comprising spaced parallel members having a bristle guiding channel between them, the channel beingdisposed'substantially racliallyo fthewheel, .a..'second bristle feeding means coniprising two elongated fiexiblernemberg' guide sheaves for each'fof such'flex'ible"members,each su'chjflexible member having'astraight portion disposed adjacent its re- 'spective' edge'of the ch'annelso as to engage bristles in such, channel,'mean s on the end'of one of the spaced parallel members forming with the second portionfof thewheel a curvedbristle conducting passage from the bi-istle con ducting channel to the brush core between the'last complete turn of each of the coils ofstrands'and theportion of each strand at its first engagement with ,the brush core orwith the'corresponding turn of the strand spaced inwardly of the brush core, means driving theflexible bristle feeding members from and in synchronism with the strandand bristle'feeding wheel, the

winding 'of the strands'by the brush core and the engagement of'such strands with the first portion of the wheel serving as the sole source of motive power to turn the wheel and to drive such elongated flexible bristle feeding members. v

, '12. In a machine for making brushes, saidmachine having incombination a brush core rotating element,

means for supplying a plurality of strands, one on top .of the other, for'the formation of a plurality of super- 7 imposed coils on the brush core and for feeding bristles lb e t'ween the superimposed turns of the coils during the rotation of the brush core, the improvement in'said last fnamed means which'comprises a carriage mounted for movement alongthe'brush c'ore parallel with the axis thereof, said carriageh aving connected thereto a bushing surrounding the as yet unwrapped brush core, means constantly'urging the carriage in' such direction as to "maintain [lateral compression by the bushing on the fturns of the strands onthe core, a strand and bristle "applying wheel rotatably mounted on the carriage and positioned adjacent one side of'the core'with': the strand 'and' bristle applying portionsof the Wheel lying adjacent fthestrand contacting side of the bushing, the axis ofjthe [wheel substantially intersecting" theaxis, of the 'core and f lying substantially normal thereto, said wheel having" a first, smaller diameter, portion: adjacent the"; surface of the led on to the brush core, theedge of "such firstfpOrti'On 'of the :wheel nearest. the strands in that portion thereof lfi'r'st engagingthe brush core'be'ing shallowly se'rratedand eing' tangential to they enteringends of such first superiinpo'sed turns of the coils, the strands engaging suchlfirst [portion of the wheel over a substantial angular extent but for less than 369, means for imposing asubstantial retarding tension on each of the strands in that portion of each leading to the wheel, and a separate means between the tension imposing means for each of the strands and the strand and bristleapplying wheel for immersing such strand in, andthus impregnating it with, a-heat curable 1 adhesive material, said wheel having a; second, larger' f'diarn eter, portion lying'o'utwardly'of the first'portion 'of of's'uch' second portion of the wheelbeing shallowly serren'i'ote fi'b'in the wheel, said' -first--feeding -r'neans cornprising "a bristle engaging r'neans 'r'ecipr'ocable longitudinally of jthehh'anh'el, Ea second bristle =fee'ding' means comprising two elongated flexible members, guidesheaves for each of such "flexible rne'mbers, each such flexible member having a -straight portion disposed -adjacent its respective edge; of "thechannel so ast'o engage bristles in such channel, thefirst recit'ed bristle feeding meansforwarding {bristles into engagement with the elongated flexible members, means fo'n' the end -of one of the spaced paia'llel'niembers forming with-the second portion of the wheet'a curved bristle cohducting'passage from the bristle conducting channel to the brush eore betweemthe last complete turn of each *ofthe coils of strands andthe portion "of eaclrstrand at its first engagement with the bru'sh core'orfth'e corresponding turn of-the strand spaced inwardlypf the 'br' ushc or'e, means driving the flexible bristle "feeding {members from 5 and in f synchronism "with the strand and bristlefeedi'n'g wheel, the windingof the strands by the brush core a'nd th'e-engagernentof-such strands-with thefirst portion 'of the wheelserving 'as' the sole source of 'r'notiye p'ower' to 'tu'rnthe wheel a'nd -todr'i've such" elongated fl'e'xible bristle feeding rn'err'ibe'rs.

13."Ina machine fo'r -making'brushes, said machine having in combination a brush" core 'ro't'atingf element, means for supplying a- "strand-"for the formation 'of a coilon the brush core and' for feeding bristles between the'turn's of 'thecoil during therotation of the core, the improvement in the lasflhar'ried- 'rne'ans which-comprises a 'supportniounted adjacent the"br'ush-core, means for moving the brush corean'd thesupp'ort relative to each other along a 'pathpa'rallel to the axis of the core,'-'a strand applying'ineans mounted on the support; a wheel mounted on the support adjacent "said last named means, said wheel having a bristle feeding'peripheryflying atl'east generally tangential tothe row: of bristles last laid on the -bru'sh co'rejrneansforsupplying-bristles'to the bristle feeding periphery of the-wheel,'nieans formingwith the bristle feeding "periphery of the "wheel a bristleconducting j passage'e'xte'nding from the bristle supplying means"substantially {directly to the brush core' between the last c'ompleteturn' of the "coil of the strand and'the'p'ortion of'the "strandiat its first engagement-with the-'core, and-means "to drive the wheel in the "same -relative -direct-ion 'as the brush core and at'aspee'd synchroni'zed-with'that of the brush core. f

14. In a machine'for making brushes,'said machine having in combination a brush core rotating e'lement, means for. supplying a'strand 'for'the"forr'nation' ofa 'c'oil on thebrush core and for'feeding bristles betweenthe turns of the" coil during therotation of the core, the'im- 'provernent 'in said last named means which comprisesa support mounted adjacent the brush 'core, meansfor moving the brush'core and the support relative to each other alolng-apath parallel to'theaxis of the'coreyastrand applying 'means mounted on'the support, a wheel 'mounted' on thesupp'ort'adjac'e'nt' such last named means, 'said"wli'eel fhaving"abristle' feeding periphery ly'ing' at 'leastfgen'erally tangential to the'row of bristles last laid 'on the brush core, means for supplying bristles to the bristle feeding "periphery of the wheel, means forming f'with the bristle feeding periphery of the wheel a curved bristle"condu'cting passage extending from the 'bristle j supplying" means substantially directly to the brush core between the last 'c o'mpl'eteturn'of the coil of the strand and 'the portion of the strandat its first engagementwith the core, and means to drive the wheel in the same'rela- :"ti've direction as the brush coreand at a" speed synchron- 'ized with-that of the brushcore.

15. Ina-machine'for makingbrushes, said machine 'having in combination a brush core rotating element,

means for supplying a strand for the formation of a'coil "on thebrush c'ore' and'for feedingbristles betweenthe turns of the coil during the rotation ofthecore, the

improvement in-said last'named means'which comprises a support mounted adjacent the brush core, means for moving 'thebrush core and the support relative to each other along-apath parallel to-the axis ofthe core, a

"rated, a bristle guiding n'i'eans on the carriage leading-tosgo s'trand=and bristle*applying'wheeL mounted on.the.{supthe periphery of the secondf'p'orti'on of thetvheelj saidlast eans comprising" spaced parallelniembershav-ing I guiding channel betweenthem,'-'the channel port and positioned adjacent one side of the -core,--the axis of=the-wheel lyingin a plane extending at =rightang'les to the axisof theb'rush-core, =said whee] having a -first *porti'ontot-engagement'with the strand asit is led-'on wheel nearest the strand in that portion thereof first engaging the brush core lying substantially along a line tangential to the entering end of such first turn, said wheel having a second, bristle feeding, portion, a bristle guid ing means on the carriage leading to the periphery of the second portion of the wheel, means forming with the second portion of the wheel a curved bristle conducting passage from the bristle guiding means to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, the winding of the strand by the core and its engagement with the first portion of the wheel serving as the sole source of motive power to turn such wheel, the second bristle feeding portion of the wheel rotating in the same relative direction as, and at a speed synchronized with the speed of, the brush core.

16. In a machine for making brushes, said machine having in combination a core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in said last named means which comprises a carriage mounted for movement along the brush core parallel with the axis thereof, said carriage having connected thereto a block, means constantly urging the carriage in such direction as to maintain lateral compression by the block on the turns of the strand on the core, a strand and bristle applying wheel mounted on the carriage and positioned adjacent one side of the core, the axis of the wheel lying in a plane extending at right angles to the axis of the brush core, said wheel being positioned adjacent the surface of the brush core, the wheel having a first portion for engagement with the strand as it is led on to the brush core, the edge of such first portion of the wheel nearest the strand in that portion thereof first engaging the brush core lying substantially along a line tangential to the entering end of such first turn, the strand engaging such first portion of the wheel over a substantial angular extent, means for imposing a sustantial retarding tension on the strand in that portion thereof leading to the wheel, said wheel having a second, larger diameter, portion lying outwardly of the first portion of the wheel with respect to the brush core, a bristle guiding means on the carriage leading to the periphery of the second portion of the wheel, means forming with the second portion of the wheel a curved bristle conducting passage from the bristle guiding means to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, the winding of the strand by the core and its 1 engagement with the first portion of the wheel serving as the sole source of motive power to turn such wheel, the rotation of the second portion of the wheel being in the same direction as, and at a speed synchronized with that of, the brush core.

17. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in said last named means which comprises a support mounted adjacent the brush core, means for moving the brush core and the support relative to each other along a path parallel to the axis of the core, a strand applying means mounted on the support, a wheel mounted on the support adjacent said last named means, said wheel having a bristle feeding periphery, means for supplying bristles to the bristle feeding periphery of the wheel, means forming with the bristle feeding periphery of the wheel a curved bristle conducting passage from the bristle supplying means to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, and means drivingly engaged by the strand as it is led to the brush core, said last named means being connected to the wheel to drive the wheel in the same relative direction as the brush core and at a speed synchronized with that of the brush core.

18. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in the last named means which comprises a support mounted closely adjacent the brush core, means for moving the brush core and the support relative to each other along a path parallel to the axis of the core, a

strand applying means mounted on the support, a wheel mounted on the support adjacent said last named means, said wheel having a bristle feeding periphery, means for supplying bristles to the bristle feeding periphery of the wheel, the bristle feeding periphery of the wheel forwarding bristles substantially directly to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, one portion of the periphery of the bristle feeding wheel lying closely adjacent and generally tangential to the row of bristles last laid on the brush core, the axis of the bristle feeding wheel lying at a marked angle with respect to the axis of the brush core, and means to drive the bristle feeding wheel in the same relative dirction as the brush core and at a speed synchronized with that of the brush core.

19. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in the last named means which comprises a support mounted closely adjacent the brush core, means for moving the brush core and the support relative to each other along the path parallel to the axis of the core, a strand applying means mounted on the support, a wheel mounted on the support adjacent said last named means, said wheel having a bristle feeding periphery, means for supplying bristles to the bristle feeding periphery of the wheel, means forming with the bristle feeding periphery of the wheel a bristle conducting passage extending from the bristle supplying means substantially directly to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, one portion of the periphery of the bristle feeding wheel lying closely adjacent and generally tangential to the row of bristles last laid on the brush core, the axis of the bristle feeding wheel lying at an angle which is in the neighborhood of a right angle with respect to the axis of the brush core, the axis of the bristle feeding wheel lying at least close to a radial plane through the brush core, and means to drive the wheel in the same relative direction as the brush core and at a speed synchronized with that of the brush core.

20. In a machine for making brushes, said machine having in combination a brush core rotating element, means for supplying a strand for the formation of a coil on the brush core and for feeding bristles between the turns of the coil during the rotation of the core, the improvement in the last named means which comprises a support mounted closely adjacent the brush core, means for moving the brush core and the support relative to each other along a path parallel to the axis of the core, a strand applying wheel mounted on the support, a bristle feeding wheel mounted on the support adjacent the strand applying wheel and at least generally coaxial therewith, said bristle feeding wheel having a bristle feeding periphery, means for supplying bristles to the periphery of the bristle feeding wheel, the periphery of the bristle feeding wheel forwarding bristles substantially directly to the brush core between the last complete turn of the coil of the strand and the portion of the strand at its first engagement with the core, one portion of the periphery of the bristle feeding wheel lying closely adjacent and generally tangential to the row of bristles last laid on the brush core, the axes of the strand applying wheel and of the bristle feeding wheel lying at an angle which is in the neighborhood of a right angle with respect to the axis of the brush core, the axis of the bristle feeding Wheel lying at least close to a radial plane through the brush core, and means to drive the bristle feeding wheel in the same relative direction as the brush core and at a speed synchronized with that of the brush core.

References Cited in the file of this patent UNITED STATES PATENTS 1,721,062 Angell July 16, 1929 1,871,775 Cave Aug. 16, 1932 1,888,352 Lipps Nov. 22, 1932 2,105,334 Scully Jan. 11, 1938 

